R help - Mar 2013 - (no subject)

I have installed GNU Emacs 24.2.1 (i386-mingw-nt6.1.7600) and  R
version 2.15.2 (2012-10-26) -- "Trick or Treat" Copyright (C) 2012 The
R Foundation for Statistical Computing Platform:
x86_64-w64-mingw32/x64 (64-bit) on Windows 7
now how can i can use R on emacs??  how do i add it as a buffer on emacs?